Schempp-Hirth toggle main switch, originally mounted in SH gliders. Switches with losing battery connection. Use a condensator in the circuit, for example Sotecc power condensator [USV2.1].
![Butterfly display 57 1st edition [BD 57]](images/butterfly-flarm-display-bd-round.jpg "Butterfly display 57 1st edition [BD 57]")
